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 ###Instrução: Qual é a Renda Familiar Mediana, quando a Renda Domiciliar Mediana é "$50,717"?
 ###Tabelas: CREATE TABLE affiliate_members (affiliate_members_id AUTO_INCREMENT PRIMARY KEY, Institution VARCHAR, Location VARCHAR, Founded INT, Type VARCHAR, Enrollment INT, Nickname VARCHAR, Current Conference VARCHAR, Pac-12 Sports VARCHAR) CREATE TABLE melodifestivalen_1997 (melodifestivalen_1997_id AUTO_INCREMENT PRIMARY KEY, Draw INT, Artist VARCHAR, Song VARCHAR, Points INT, Place VARCHAR) CREATE TABLE georgia_counties_ranked_by_per_capita_income (georgia_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE pocket_monsters:_diamond__&__pearl_series (pocket_monsters:_diamond__&__pearl_series_id AUTO_INCREMENT PRIMARY KEY, # INT, Japanese title VARCHAR, Rōmaji VARCHAR, Japanese translation VARCHAR, Vocalist VARCHAR, Episodes used VARCHAR) CREATE TABLE conference_standings (conference_standings_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, SEC Wins INT, SEC Losses INT, Percentage VARCHAR, Home Record VARCHAR, Road Record VARCHAR, Overall Record VARCHAR)  
SELECT Median family income FROM georgia_counties_ranked_by_per_capita_income WHERE Median household income = $50,717